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Article
Hydrogenation
Article By:
Lee, Roberto Monsanto Company, St. Louis, Missouri.
Last reviewed:November 2018
DOI:https://doi.org/10.1036/1097-8542.329300
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The chemical reaction of molecular hydrogen (H2) with another substance, generally an unsaturated organic compound, and usually under the influence of temperature, pressure, and a metal catalyst. There are several types of hydrogenation reactions. They include (1) the addition of hydrogen to reactive molecules; (2) the incorporation of hydrogen accompanied by cleavage of the starting molecules (hydrogenolysis); and (3) reactions in which isomerization, cyclization, and so on, result. Other reactions that involve molecular hydrogen and catalysts are reductive amination (hydroammonolysis) and hydroformylation (oxo reaction). See also: Hydroformylation; Hydrogen; Organic synthesis
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